Field Protection: Integrated pilot gas filter and inlet screens prevent particulate contamination from fouling the valve seat or orifices

Equipment Protection: Includes a dedicated short cycle protection timer and an electronic discharge air sensor to safeguard system longevity

It supports a maximum inlet pressure of 1/2 PSI and is critical for applications requiring stable

We recommend checking your manual for specific HVAC part number matching before installation

ensuring seamless integration into existing BAS or pneumatic-to-electronic conversion systems

McDonnell & Miller 340400 Seal Assembly 320735-701 Field Protection: Integrated pilot gasThe McDonnell & Miller 340400 Seal Assembly, also categorized under model number SA27T 75, is a critical replacement component engineered for use with Series 25 A make up water feeders. Designed to maintain the integrity of the diaphragm seal within the feeder system, this assembly ensures consistent boiler water level control by preventing bypass leakage between the float and valve chambers. This replacement diaphragm assembly is built to withstand